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package com.medusa.gruul.common.core.auth.client.filter;

import cn.hutool.core.codec.Base64;
import cn.hutool.core.util.StrUtil;
import com.medusa.gruul.common.core.auth.client.helper.ISecurity;
import com.medusa.gruul.common.core.auth.model.CompleteUser;
import com.medusa.gruul.common.core.auth.model.User;
import com.medusa.gruul.common.core.auth.model.constant.Headers;
import com.medusa.gruul.common.core.config.Jackson;
import com.medusa.gruul.common.core.auth.model.constant.FilterOrders;
import com.medusa.gruul.common.core.auth.client.context.UserContextHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 解析请求头 Auth-User 数据 设置到UserContextHolder中
 * @author 张治保
 * date 2021/12/2
 */
@Slf4j
@Component
@Order(FilterOrders.USER_INFO)
public class UserFilter extends AbstractServletFilter {

    @Override
    public void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws IOException, ServletException {
        String token = ISecurity.token().can();
        String userStr = request.getHeader(Headers.USER);
        if (StrUtil.isNotBlank(token) && StrUtil.isNotBlank(userStr)){
            User user = Jackson.readValue(Base64.decodeStr(userStr), User.class);
            UserContextHolder.set(
                new CompleteUser().setUser(user).setUserStr(userStr).setJti(request.getHeader(Headers.JTI))
            );
        }
        filterChain.doFilter(request,response);
        UserContextHolder.clear();
    }
    
}
